Your site is losing customers.
Here is where, and how to fix it.

Yes. One complete audit is free — no account, no card — and the report is not cut down. After that, a free account gives you 3 audits a day, running exactly the same measurements as the paid plans.

Eight pillars: performance, loaded in a real browser on both mobile and desktop; HTTP header security, on the Mozilla Observatory scale; infrastructure (DNS, TLS certificate, SPF, DKIM, DMARC); accessibility through axe-core, the engine Lighthouse itself uses; technical SEO; GDPR compliance, observed without ever clicking the cookie banner; responsive behaviour; and code quality.

Because PageSpeed Insights simulates a low-end phone and a slow connection arithmetically, where we apply both to a real Chromium. On a heavy site the gap reaches tens of points, and our score is what a visitor with a cold cache actually gets. Against a Lighthouse run with applied throttling, the gap falls back to a few points. The pillar-by-pillar detail is on /en/checkweb/comparatif; the measured gaps are on the methodology page.

No, and no machine can. We settle 26 of the 106 criteria of the French RGAA (the national implementation of WCAG 2.1 AA) automatically; the rest needs human judgement. You get the automated findings, a prioritised remediation plan and a draft conformity statement — the legally binding audit remains an expert’s work.

The report goes into your own history, partitioned, kept for 90 days and deletable in one click. The public barometer keeps only scores and a date: neither the address, nor who asked for it.

French (the default), English on /en and simplified Chinese on /zh. The whole report follows the language you pick — not just the menus, but the title, explanation and recommendation of every finding. The analysis itself is identical: the same measurements and the same scoring scale in all three languages.